Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/kastheco/claude-plugins/kaschecknpx skills add kastheco/claude-plugins --skill kascheckgit clone --depth 1 https://github.com/kastheco/claude-pluginsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/kastheco/claude-plugins/kascheck)<a href="https://agentmods.dev/skills/kastheco/claude-plugins/kascheck"><img src="https://agentmods.dev/badge/skills/kastheco/claude-plugins/kascheck.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00071 | $0.02704 |
| Opus 5 | $0.00036 | $0.01352 |
| Sonnet 5 | $0.00014 | $0.00541 |
| Haiku 4.5 | $0.00007 | $0.00270 |
Grade A, and why
Kascheck scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 380 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Kascheck
Analyze projects (especially vibe-coded/AI-generated) to assess production readiness and identify required remediation work.
Slash Command
/kascheck:audit [path] [--detailed]
path: Local directory path to analyze (defaults to current directory)--detailed: Include specific file paths, code examples, and remediation steps
Output Format
The audit produces a comprehensive report with three views:
- Checklist View: Pass/Warn/Fail for each category
- Priority View: Critical/High/Medium/Low issues with remediation
- Effort View: Quick fix / Moderate / Significant refactor categorization
Audit Process
Phase 1: Discovery (Subagent)
Spawn an Explore agent to understand the project:
Task("Kascheck: Discover project structure
Analyze this project to understand:
1. Technology stack (languages, frameworks, databases)
2. Project structure (monorepo, single app, microservices)
3. Entry points (main files, routers, handlers)
4. Configuration files present
5. Test file locations
6. Documentation files
Return a structured summary including:
- Primary language(s) and framework(s)
- Architecture pattern detected
- Key directories and their purposes
- Configuration files found
- Test coverage presence
Path: {target_path}", subagent_type="Explore")
Phase 2: Security Audit (Subagent)
Task("Kascheck: Security assessment
Analyze security practices in this {framework} project at {target_path}:
**Authentication & Authorization:**
- [ ] Authentication mechanism present and properly implemented
- [ ] Authorization/RBAC enforced on protected routes
- [ ] Session management secure (HttpOnly, Secure, SameSite cookies)
- [ ] JWT implementation secure (proper signing, expiration, refresh)
**Input Validation:**
- [ ] Request validation on all endpoints
- [ ] SQL injection prevention (parameterized queries/ORM)
- [ ] XSS prevention (output encoding, CSP headers)
- [ ] File upload validation (type, size, content)
**Secrets Management:**
- [ ] No hardcoded secrets in code
- [ ] Environment variables for configuration
- [ ] .env files in .gitignore
- [ ] Secrets not logged or exposed in errors
**API Security:**
- [ ] CORS properly configured (not wildcard in production)
- [ ] Rate limiting implemented
- [ ] Security headers present (HSTS, X-Frame-Options, etc.)
- [ ] HTTPS enforced
**OWASP Top 10 2025 Check:**
- [ ] A01: Broken Access Control
- [ ] A02: Security Misconfiguration
- [ ] A03: Software Supply Chain Failures
- [ ] A04: Cryptographic Failures
- [ ] A05: Injection
- [ ] A06: Insecure Design
- [ ] A07: Identification/Authentication Failures
- [ ] A08: Software/Data Integrity Failures
- [ ] A09: Security Logging/Alerting Failures
- [ ] A10: Mishandling Exceptional Conditions
Reference: references/security-checklist.md
Return findings with severity (CRITICAL/HIGH/MEDIUM/LOW) and specific file locations.", subagent_type="general-purpose")
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 380 lines · 71 tokens per session scan A 4f933a433566
Kascheck is a skill published in the GitHub repository kastheco/claude-plugins (2 stars, last pushed 4mo ago), licensed MIT. It adds 71 tokens to every session and 2,704 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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